GlPushMatrix(): It pushes the current matrix stack down by one, duplicating the current matrix. Along with this, we use the following functions: DISP FUNCTION – In this function star1, star2, star3, scredisp, and missed functions are called. The variable xb is used to compute the location of the next refresh whereas yb is kept constant.ĥ. The moveright() and moveleft() are used to move the basket to different x positions. We have used GL_QUADS to draw the basket. BASKET FUNCTION -This function is used to display the basket. These APIs are called before calling the functions basket() and disp() and finally glFlush() forces the buffered OpenGL commands to execute.Ĥ. The glClear() API is used to clear the window background and glClearColor() API specifies the RGB and alpha values to clear the color buffers. In this function, two functions are being called basket() and disp().

display() – The display function registers call back handler for window re-paint. See also Geometric Operations Computer Graphics Project in OpenGL Source Code – 18CSL67 It uses a drawstring function to display the string of characters. This window is displayed when the user presses ‘S’ at the front screen window. instr() – The instr function displays the instructions of the game which is very helpful to a beginner. If the user presses ‘S’ then display() window is called thus allowing the player to interact with the game. Here the player has an option: to start the game press ‘Enter’ which is followed by the instr() window.

It is also the beginning phase of the program. It uses a drawstring function to display the information. title of the project, group name, made by, and guided by. frontscreen() – The front screen function displays the information about the project i.e. The following is the list of functions :įrontscreen(), instr(), display() and missdisp() MYDISPLAY FUNCTION – In mydisplay(), four functions have been called. In this function, the edges are defined and the boundary is set so that the objects can interact within the boundaries.ģ. It first computes the aspect ratio of the new window then it computes the aspect ratio of the new window and finally it sets the aspect ratio of the clipping area to match the viewport. RESHAPE FUNCTION – This Function is called back when the windows are re-sized. The following functions are registered to be used in the program :Īnd finally, glutMainLoop() is used to enter the event processing loop and calls the functions which are registered in the body of the main function.Ģ. The window is created using glutCreateWindow(“DoraCatch”) and the name of the created window is given in quotes.

The size and position of the window is defined using glutInitWindowSize(width,height), glutInitWindowPosition(posX,posY) respectively. See also Fighter Jet Computer Graphics Project in OpenGL Source Code – 18CSL67

Opengl paint program source code